Scatter chart data set color not working

[jpv123]

Hello. I have a scatter chart view that works correctly. It has many data sets and the values are displaying normally. To each data set I'm assigning different colors like this

if mainIndex == 0 {
    indexDataSet.setColor(UIColor.redColor())
} else if mainIndex == 1 {
    indexDataSet.setColor(UIColor.blueColor())
} else if mainIndex == 2 {
    indexDataSet.setColor(UIColor.greenColor())
} else {
    indexDataSet.setColor(UIColor.yellowColor())
}

However when I run the code, all the values are yellow. It seems that the chart takes only the color of the last data set. Any ideas on how to solve this?

Thanks

[liuxuan30]

ChartsDemo's scatter chart could have different colors. Please look at
- (void)setDataCount:(int)count range:(double)range in scatter chart view controller for how to set the colors.

if it's always yellow, I suspect either indexDataSet is the same or mainIndex has problems

[jpv123]

Can you please take a look at the code? maybe i'm missing something

var indexDataEntriesArray = [ChartDataEntry]()
var indexDataSetArray = [ScatterChartDataSet]()

var index = 0
var mainIndex = 0
for mainObject in mainArray {
    for value in mainObject.valuesArray {
        let scatterDataEntry = ChartDataEntry(value:value, xIndex: index)
        indexDataEntriesArray.append(scatterDataEntry)

        index++
    }

    let indexDataSet = ScatterChartDataSet(yVals: indexDataEntriesArray, label: "")
    if mainIndex == 0 {
        indexDataSet.setColor(UIColor.redColor())
    } else if mainIndex == 1 {
         indexDataSet.setColor(UIColor.blueColor())
    } else if mainIndex == 2 {
         indexDataSet.setColor(UIColor.greenColor())
    } else {
         indexDataSet.setColor(UIColor.yellowColor())
    }
    indexDataSet.label = ""
    indexDataSet.drawHorizontalHighlightIndicatorEnabled = false
    indexDataSet.drawVerticalHighlightIndicatorEnabled = false
    indexDataSet.scatterShape = .Circle
    indexDataSet.scatterShapeSize = 5
    indexDataSetArray.append(indexDataSet)

    mainIndex++
    index = 0
}

//Add all datasets
let indexData = ScatterChartData(xVals: yearsArray)
for indexDataSet in indexDataSetArray {
    indexData.addDataSet(indexDataSet)
}

indexChartView.data = indexData
indexChartView.setNeedsDisplay()

[liuxuan30]

well with a glimpse, it seems fine, but you need to debug it on your own, it's more efficient, especially you have ChartsDemo to play with.